The Sanilac Shores Underwater Preserve was established to promote conservation of the submerged historical resources in Lake Huron near Port Sanilac, Michigan. The Sanilac Shores Underwater Preserve spans a total of 163 square miles (420 km2) of Lake Huron. The Michigan Underwater Preserve Council oversees activities relating to all of Michigan's Underwater Preserves.The preserve is open to scuba divers.